MARLIN BARREL ON A SAVAGE M10

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  • Last Post 25 October 2018
joeb33050 posted this 20 October 2018

To put a Marlin XS7 barrel, 223, on a Savage M10 action, I ground ~.2" off the FRONT of a Savage barrel nut. Everything fit, headspaced fine.

This after hours of assembling, measuring. disassembling, measuring... The Savage barrel nut front end goes over the unthreaded part of the Savage barrel---it does NOT fit over the too-big unthreaded part of the Marlin barrel.

NOTE: A FL sized 223 case protrudes from the/a Savage barrel ~.130"/.140"; and from a Marlin barrel ~ .150"-.160".

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Mike H posted this 20 October 2018

To put a Marlin XS7 barrel, 223, on a Savage M10 action, I ground ~.2" off the FRONT of a Savage barrel nut. Everything fit, headspaced fine.

This after hours of assembling, measuring. disassembling, measuring... The Savage barrel nut front end goes over the unthreaded part of the Savage barrel---it does NOT fit over the too-big unthreaded part of the Marlin barrel.

NOTE: A FL sized 223 case protrudes from the/a Savage barrel ~.130"/.140"; and from a Marlin barrel .230"/.240"-10 cases measured.

An extra protrusion of 0.100” from the chamber would concern me.

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John Alexander posted this 21 October 2018

If I understand this right, then the Marlin barrel had .23/.24" protruding while in the Marlin rifle.

If so Marlin must have thought that was OK????  Like Mike, that seems like a heck of a lot and for what purpose I wonder? Needed because of extractor design???  I don't have a sectioned 223 case handy so have no idea of thickness at that point.

John

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joeb33050 posted this 21 October 2018

It looked wrong to me too. I took everything apart, FL sized new brass, measured Savage and Marlin protrusion, Marlin now ~.150"-.160". Looks a lot better. All together, loaded, shoot tomorrow. ???Why the error???

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Ken Campbell Iowa posted this 21 October 2018

... joeb ... when i converted your 223 to a 22-250 i aimed for 0.125 with a headspace gauge ...

you might be showing why we really should use a gauge.   and yeah, if someone wants an " econo-job " i do sometimes use new factory brass .... hopefully try several brands  ....

even brand name gauges give different results ... heh ...  ... still, 0.030 seems a lot ... for medium cast loads it probably is no problem .

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i might mention that on my ruger3 in 45-70, there is zero extra clearance in that cut for the extractor to bottom  ... a slight factory error ... if i don't fire the cartridge, it might not allow the extractor to get under the rim ...  maybe marlin is guaranteeing their extractor to work with least hand fitting.   i bet they don't have * bolt bump * case rim fitting either ...

ken

 

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joeb33050 posted this 22 October 2018

68 gr bullets won't stay on a 2' X 2' paper at 100 yards. Pourquoi? 9" twist , measured with my Stanley tape.

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Ken Campbell Iowa posted this 23 October 2018

joeb ... i like that project ... if you haven't seen it, here is an interesting post where they put a savage barrel on a marlin x7 ...  they mention 0.015 as an " adjustment " ...   

https://thefiringline.com/forums/showthread.php?t=425170

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let me know if i can help .....  always convert it to 22-250 ...

how can a system that should shoot into the same hole shoot 12 inch " flyers " ...  wonder how much worse an * outliar * would be ?? ....

ken

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joeb33050 posted this 25 October 2018

10/25/18 68 GR BULLETS WON'T STAY ON THE PaPER AT 100 YARDS.

40 GR BULLETS, 3 IN .5", 5 IN 1.225", 5 IN .9".

It's the twist, my other 9" twist barrels stabilize the 68 gr, and shoot well < 1" 100 yd 5 shot 5 group avg.

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